Quasi-static load bearing behaviour of hybrid grouted joints

Jakob Boretzki, M. Albiez, T. Ummenhofer
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引用次数: 1

Abstract

In offshore applications, high-strength grout is used to connect tubular steel sections. Grouted connections rely on welded shear keys to ensure sufficient interlocking of the grout-steel interface. These shear keys lead to stress concentrations, which in turn lead to fatigue cracks, and local damage of the grout. The hybrid grouted joint is a newly developed connection that is characterised by a multi-layered composition. In contrast to state-of-the-art grouted joints, hybrid grouted joints include thin adhesive layers, which are applied on the steel surfaces prior to grouting. The new connection type is in the focus of a recently finished research project. This paper presents selected results concerning the quasi-static load-bearing capacity under axial loading. The experimental campaign aimed at identifying and quantifying various aspects that influence the connection's performance. Different adherent combinations, varying overlap lengths, load directions and systematically induced imperfections were evaluated.
混合灌浆节点的准静态承载特性
在海上应用中,高强度灌浆用于连接钢管截面。注浆连接依靠焊接剪切键来确保注浆-钢界面的充分联锁。这些剪切键导致应力集中,从而导致疲劳裂纹和局部破坏。混合注浆接头是一种新开发的连接方式,其特点是具有多层结构。与最先进的灌浆接缝相比,混合灌浆接缝包括薄胶粘剂层,在灌浆之前应用于钢表面。这种新的连接类型是最近完成的一个研究项目的重点。本文介绍了轴向载荷作用下的准静态承载能力的一些研究结果。实验活动旨在识别和量化影响连接性能的各个方面。不同的粘附组合,不同的重叠长度,载荷方向和系统诱导缺陷进行了评估。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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